{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:QD3Y7V263ET4TWJ3TZIJVXLNK5","short_pith_number":"pith:QD3Y7V26","canonical_record":{"source":{"id":"1404.7725","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-30T13:54:08Z","cross_cats_sorted":[],"title_canon_sha256":"067591ee8eb2f60190b0951547f727585461af69292e53362c5743e29ae65691","abstract_canon_sha256":"1f3ad55609b7ad82ab6856a9e6a4760bb3d2d17550d9c75d8b125a7ef87f04c2"},"schema_version":"1.0"},"canonical_sha256":"80f78fd75ed927c9d93b9e509add6d574733d5f07a3047ddc053a03fa43ada05","source":{"kind":"arxiv","id":"1404.7725","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.7725","created_at":"2026-05-18T02:29:08Z"},{"alias_kind":"arxiv_version","alias_value":"1404.7725v3","created_at":"2026-05-18T02:29:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.7725","created_at":"2026-05-18T02:29:08Z"},{"alias_kind":"pith_short_12","alias_value":"QD3Y7V263ET4","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"QD3Y7V263ET4TWJ3","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"QD3Y7V26","created_at":"2026-05-18T12:28:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:QD3Y7V263ET4TWJ3TZIJVXLNK5","target":"record","payload":{"canonical_record":{"source":{"id":"1404.7725","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-30T13:54:08Z","cross_cats_sorted":[],"title_canon_sha256":"067591ee8eb2f60190b0951547f727585461af69292e53362c5743e29ae65691","abstract_canon_sha256":"1f3ad55609b7ad82ab6856a9e6a4760bb3d2d17550d9c75d8b125a7ef87f04c2"},"schema_version":"1.0"},"canonical_sha256":"80f78fd75ed927c9d93b9e509add6d574733d5f07a3047ddc053a03fa43ada05","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:29:08.331956Z","signature_b64":"WaIgn9dzsTzms4mvgs3e+unoZ94xYUPHZgScJS2/mPnehGzc2fkCVSl96c8DdGGcvd0CEAQ8RrbxNhHdi4jYDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"80f78fd75ed927c9d93b9e509add6d574733d5f07a3047ddc053a03fa43ada05","last_reissued_at":"2026-05-18T02:29:08.331497Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:29:08.331497Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.7725","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:29:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H9u1xVoL7NDRAvzosCaQtApWGrhJwod0picyICwjCs3/j5rTEsqlbKxecGsKwecHFhhBh8Wb2qK0q5jqRg9vCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T16:15:34.319127Z"},"content_sha256":"5cdc01fee5ce6fd0742dee0ab6dd22ccaed9b09ccbb3f13bc24514eea737e8ff","schema_version":"1.0","event_id":"sha256:5cdc01fee5ce6fd0742dee0ab6dd22ccaed9b09ccbb3f13bc24514eea737e8ff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:QD3Y7V263ET4TWJ3TZIJVXLNK5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing spectral-temporal correlations with a versatile integrated source of parametric down-conversion states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Benjamin Brecht, Christine Silberhorn, Georg Harder, Vahid Ansari","submitted_at":"2014-04-30T13:54:08Z","abstract_excerpt":"The spectral-temporal correlation and the correlation time of a biphoton wavepacket generated in the process of parametric down-conversion (PDC), is of great importance for a broad range of quantum experiments. We utilise an integrated PDC source to generate biphotons with different types of spectral-temporal correlations and probe their respective correlation times. The outcomes confirms that the correlation time is independent of the coherence time of the pump light, and it is only determined by the waveguide length and its dispersion properties. Furthermore, we investigate the properties of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.7725","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:29:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y2qLXxAI53HFY/dy89+NDMNtvd4D4+HA0YO6qWhtsAgB/TTOoAa3j3Ywe16wdCRKq6bO7eXHL1FsyL4bwYz/BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T16:15:34.319488Z"},"content_sha256":"c0dd8386214b21438761abc9c27532525031a3952efe0d3716ff63ad73693751","schema_version":"1.0","event_id":"sha256:c0dd8386214b21438761abc9c27532525031a3952efe0d3716ff63ad73693751"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QD3Y7V263ET4TWJ3TZIJVXLNK5/bundle.json","state_url":"https://pith.science/pith/QD3Y7V263ET4TWJ3TZIJVXLNK5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QD3Y7V263ET4TWJ3TZIJVXLNK5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-21T16:15:34Z","links":{"resolver":"https://pith.science/pith/QD3Y7V263ET4TWJ3TZIJVXLNK5","bundle":"https://pith.science/pith/QD3Y7V263ET4TWJ3TZIJVXLNK5/bundle.json","state":"https://pith.science/pith/QD3Y7V263ET4TWJ3TZIJVXLNK5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QD3Y7V263ET4TWJ3TZIJVXLNK5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:QD3Y7V263ET4TWJ3TZIJVXLNK5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"1f3ad55609b7ad82ab6856a9e6a4760bb3d2d17550d9c75d8b125a7ef87f04c2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-30T13:54:08Z","title_canon_sha256":"067591ee8eb2f60190b0951547f727585461af69292e53362c5743e29ae65691"},"schema_version":"1.0","source":{"id":"1404.7725","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.7725","created_at":"2026-05-18T02:29:08Z"},{"alias_kind":"arxiv_version","alias_value":"1404.7725v3","created_at":"2026-05-18T02:29:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.7725","created_at":"2026-05-18T02:29:08Z"},{"alias_kind":"pith_short_12","alias_value":"QD3Y7V263ET4","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"QD3Y7V263ET4TWJ3","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"QD3Y7V26","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:c0dd8386214b21438761abc9c27532525031a3952efe0d3716ff63ad73693751","target":"graph","created_at":"2026-05-18T02:29:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The spectral-temporal correlation and the correlation time of a biphoton wavepacket generated in the process of parametric down-conversion (PDC), is of great importance for a broad range of quantum experiments. We utilise an integrated PDC source to generate biphotons with different types of spectral-temporal correlations and probe their respective correlation times. The outcomes confirms that the correlation time is independent of the coherence time of the pump light, and it is only determined by the waveguide length and its dispersion properties. Furthermore, we investigate the properties of","authors_text":"Benjamin Brecht, Christine Silberhorn, Georg Harder, Vahid Ansari","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-30T13:54:08Z","title":"Probing spectral-temporal correlations with a versatile integrated source of parametric down-conversion states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.7725","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5cdc01fee5ce6fd0742dee0ab6dd22ccaed9b09ccbb3f13bc24514eea737e8ff","target":"record","created_at":"2026-05-18T02:29:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"1f3ad55609b7ad82ab6856a9e6a4760bb3d2d17550d9c75d8b125a7ef87f04c2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-30T13:54:08Z","title_canon_sha256":"067591ee8eb2f60190b0951547f727585461af69292e53362c5743e29ae65691"},"schema_version":"1.0","source":{"id":"1404.7725","kind":"arxiv","version":3}},"canonical_sha256":"80f78fd75ed927c9d93b9e509add6d574733d5f07a3047ddc053a03fa43ada05","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"80f78fd75ed927c9d93b9e509add6d574733d5f07a3047ddc053a03fa43ada05","first_computed_at":"2026-05-18T02:29:08.331497Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:29:08.331497Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WaIgn9dzsTzms4mvgs3e+unoZ94xYUPHZgScJS2/mPnehGzc2fkCVSl96c8DdGGcvd0CEAQ8RrbxNhHdi4jYDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:29:08.331956Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.7725","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5cdc01fee5ce6fd0742dee0ab6dd22ccaed9b09ccbb3f13bc24514eea737e8ff","sha256:c0dd8386214b21438761abc9c27532525031a3952efe0d3716ff63ad73693751"],"state_sha256":"46f81d180e40f6c63cbd29ea1eef6efe59225b96eee4a9b8827305a2cc4cdcbb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZXOAQfsGSaPlWjQIkUWX+dVBtfXxQ1guV0Zfn0D3zRcbI8xWTAYX/2t5n5iPTf0GH08tobKV21QOyqjxefiyAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T16:15:34.321333Z","bundle_sha256":"4a05529a08d2f94a2029d6ae005bed28d90d40b0c881991450ea6e6fbaa1fb3f"}}